519
FNCA52 TJSJ 220730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST FRI MAY 22 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-222000-
SOUTHEAST COASTAL PLAINS-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 0
TEMP (24H TREND) 89 (+2) 72 (-2) 90
RH % (24H TREND) 50 (-4) 91 (+5) 50
WIND 20FT/EARLY(MPH) E 17 E 14 E 17
WIND 20FT/LATE(MPH) E 18 NE 11 E 19
MIXING HGT(FT-AGL/MSL)4820 4840
TRANSPORT WND (MPH) E 17 E 16
VENT RATE (KT-FT) 72300 67760
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-222000-
SOUTHERN HILLS-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 10
TEMP (24H TREND) 85 (+2) 69 (-2) 86
RH % (24H TREND) 62 (-2) 97 (+4) 60
WIND 20FT/EARLY(MPH) E 13 E 13 E 13
WIND 20FT/LATE(MPH) E 13 E 12 E 13
MIXING HGT(FT-AGL/MSL)5070 5260
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 65910 68380
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-222000-
NORTH COASTAL PLAINS-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 20
TEMP (24H TREND) 88 (0) 72 (-2) 88
RH % (24H TREND) 61 (0) 98 (+5) 60
WIND 20FT/EARLY(MPH) E 14 E 17 E 16
WIND 20FT/LATE(MPH) E 18 E 14 E 18
MIXING HGT(FT-AGL/MSL)4500 4030
TRANSPORT WND (MPH) E 15 E 17
VENT RATE (KT-FT) 58500 60450
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-222000-
NORTHERN HILLS-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 30 40
TEMP (24H TREND) 87 (+1) 69 (-2) 87
RH % (24H TREND) 64 (+4) 98 (+3) 64
WIND 20FT/EARLY(MPH) E 12 E 14 E 14
WIND 20FT/LATE(MPH) E 16 E 11 E 17
MIXING HGT(FT-AGL/MSL)4870 4700
TRANSPORT WND (MPH) E 12 E 14
VENT RATE (KT-FT) 48700 56400
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-222000-
WEST COAST-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 60 40
TEMP (24H TREND) 90 (+1) 72 (-1) 89
RH % (24H TREND) 62 (+1) 96 (+5) 62
WIND 20FT/EARLY(MPH) E 14 E 14 E 13
WIND 20FT/LATE(MPH) E 14 E 12 E 13
MIXING HGT(FT-AGL/MSL)5000 4740
TRANSPORT WND (MPH) E 13 E 10
VENT RATE (KT-FT) 55000 42660
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-222000-
EASTERN INTERIOR-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 20
TEMP (24H TREND) 87 (+2) 70 (-2) 87
RH % (24H TREND) 62 (-1) 98 (+3) 61
WIND 20FT/EARLY(MPH) E 14 E 13 E 14
WIND 20FT/LATE(MPH) E 14 E 14 E 14
MIXING HGT(FT-AGL/MSL)5010 4550
TRANSPORT WND (MPH) E 16 E 16
VENT RATE (KT-FT) 70140 63700
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-222000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 50 20
TEMP (24H TREND) 83 (+3) 68 (-3) 83
RH % (24H TREND) 67 (-3) 100 (+3) 66
WIND 20FT/EARLY(MPH) E 12 E 11 E 12
WIND 20FT/LATE(MPH) E 13 E 11 E 12
MIXING HGT(FT-AGL/MSL)4300 3540
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 64500 56640
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-222000-
CENTRAL MOUNTAIN RANGE-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 70 50 40
TEMP (24H TREND) 84 (+3) 66 (-3) 85
RH % (24H TREND) 67 (+2) 98 (+4) 65
WIND 20FT/EARLY(MPH) E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 10 E 10 E 11
MIXING HGT(FT-AGL/MSL)5500 5520
TRANSPORT WND (MPH) E 12 E 12
VENT RATE (KT-FT) 55000 55200
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-222000-
CAYEY MOUNTAIN RANGE-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 10
TEMP (24H TREND) 82 (+1) 69 (-1) 83
RH % (24H TREND) 68 (0) 100 (+2) 66
WIND 20FT/EARLY(MPH) E 12 E 11 E 12
WIND 20FT/LATE(MPH) E 12 E 10 E 11
MIXING HGT(FT-AGL/MSL)4730 4090
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 66220 61350
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-222000-
VIEQUES-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 20
TEMP (24H TREND) 88 (0) 77 (+1) 89
RH % (24H TREND) 60 (+1) 84 (-6) 57
WIND 20FT/EARLY(MPH) E 17 E 17 E 18
WIND 20FT/LATE(MPH) E 17 E 18 E 18
MIXING HGT(FT-AGL/MSL)3920 3280
TRANSPORT WND (MPH) E 21 E 23
VENT RATE (KT-FT) 70560 65600
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-222000-
CULEBRA-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 20
TEMP (24H TREND) 90 (+2) 78 (+2) 91
RH % (24H TREND) 57 (-5) 86 (-4) 54
WIND 20FT/EARLY(MPH) E 17 E 17 E 18
WIND 20FT/LATE(MPH) E 17 E 18 E 18
MIXING HGT(FT-AGL/MSL)4070 3310
TRANSPORT WND (MPH) E 18 E 24
VENT RATE (KT-FT) 65120 69510
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-222000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 90 (+2) 73 (-2) 89
RH % (24H TREND) 49 (-5) 87 (+3) 52
WIND 20FT/EARLY(MPH) E 20 E 20 E 19
WIND 20FT/LATE(MPH) SE 20 E 14 E 19
MIXING HGT(FT-AGL/MSL)5000 5070
TRANSPORT WND (MPH) E 21 E 17
VENT RATE (KT-FT) 90000 76050
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-222000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 86 (+2) 77 (+1) 87
RH % (24H TREND) 63 (-4) 85 (-3) 60
WIND 20FT/EARLY(MPH) E 17 E 18 E 19
WIND 20FT/LATE(MPH) E 17 E 19 E 19
MIXING HGT(FT-AGL/MSL)4200 3440
TRANSPORT WND (MPH) E 20 E 23
VENT RATE (KT-FT) 71400 68800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-222000-
ST CROIX-
330 AM AST FRI MAY 22 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 20
TEMP (24H TREND) 88 (+1) 76 (0) 88
RH % (24H TREND) 61 (-2) 88 (0) 61
WIND 20FT/EARLY(MPH) E 17 E 19 E 17
WIND 20FT/LATE(MPH) E 17 E 19 E 19
MIXING HGT(FT-AGL/MSL)4780 4090
TRANSPORT WND (MPH) E 20 E 24
VENT RATE (KT-FT) 81260 85890
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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